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The ESO (Emergency Sea Outfall) will be used to dispose excess fully Treated Sewage Effluent into the sea in case when TSE production is higher than the TSE demand
The ESO from Stage 1 Plant to the Sea originates near the Northeastern corner of the Plant area and is a continuous underground line for 6.08 km long.
The onshore part of ESO line covers for 3.81 km. After the onshore part, the tunneling part of offshore section extends around 1.96 km into the Arabian Gulf Sea. Treated Sewage Effluent is dispersed into the sea with the help of non-return duckbill valves which are spread over a length of 310 m diffuser pipe, which is connected to the end of offshore tunnel.
The internal diameter of pipeline is 2400 mm at the onshore part, wherein the offshore pipeline is having an internal diameter of 2200 m.
Electrical Special Facility in Umm Al Hayman “W” 300/132/11 kV Substation and infeed is by 300 kV overhead line between Zour south power station “ZSPS” and Shuaiba “W” cut in and diverted to Umm Al Hayman “W” which is connected by 300 kV UG cable. Umm Al Hayman “W” substation is providing power to the Plant and other consumers in the area and it’s under operation by MEW.
Electrical Special Facilities in the inside of this Stage 1 Plant area. The total area of ESF is 14400 m2. Access to the Electrical Special Facilities site is via asphalt road which is part of the road design of the plant. The Electrical Special Facilities road is connected to the main plant access road. The internal access road (inside of the boundary but outside of the fence) is connected to the public road as part of the project.
The DBO Works of Umm Al Hayman Wastewater Project include development, insurance, design, engineering, procurement, supplying, manufacturing, factory testing, transportation to the site, construction, erection, installation, permitting, completion, testing, commissioning, and carry out other work necessary to construct the Transmission and Distribution System (“TADS”) (including the Egailah Substation and Pumping Station) and the Existing Facilities ROD Works in accordance with the TST PPP Agreement and particularly these Technical Specifications and as applicable for the TADS in accordance with the DBO EPC Contract. The DBO works is divided into 15 Main Assets classified into 4 Wastewater Transmission (“WWTS”) Assets, 6 Treated Sewage Effluent Transmission System (“TSETS”) Assets, and 5 Treated Sewage Effluent Distribution Network (“TSEDN”) Assets.
Egailah Waste Water Pumping Station (WWPS) was commissioned in the year 2011 and delivers wastewater with a current hydraulic capacity of up to 2.8 m3/s to the existing Riqqa WWTP.
The hydraulic capacity of Egailah WWPS increased from 2.8 m3/s to 8.3 m3/s.
All upgrade measures were implemented without any interruption of the operation of the Egailah WWPS.
New substation (132/11 kV) to deliver sufficient power for the upgraded Egailah WWPS.
| Main WWPS Egailah | Basement | Roof |
|---|---|---|
| Number of pumps | 10 (8+2) | 10 (8+2) |
| Installation | Dry installed | Dry installed |
| Hydraulic capacity [m3/s] | 0.85 (per pump) | 1.0375 (per pump) |
| Delivery head [m] | 74.6 | 60.6 |
| Rating [kW] | 1,000 | 1,000 |
| Type | submersible | submersible |
| Additional WWPS Egailah | |
|---|---|
| Number of pumps | 6 (4+2) |
| Installation | Dry installed |
| Hydraulic capacity [m3/s] | 0.375 (per pump) |
| Delivery head [m] | 41.60 |
| Rating [kW] | 210 |
| Type | submersible |
A new Sabah Al Ahmed Waste Water Pumping Station (SAA WWPS) was constructed in the southwest of the Project area. The hydraulic capacity of SAA WWPS 2.18 m3/s and the wastewater are transferred to the UAH WWTP Stage 1 through a new wastewater transmission system.
The wastewater transmission mains from SAA WWPS to the UAH WWTP Stage 1 include 2 x DN 1100 and the TSE transmission main to the existing Sabah Al Ahmed reservoir 1 x DN 1100 are constructed in a common corridor.
| New WWPS Sabah Al Ahmed | |
|---|---|
| Number of Pumps | 6 (4+2) |
| Installation | dry installed |
| Hydraulic Capacity [m3/s] | 0.545 (per pump) |
| Delivery head [m] | 30.7 |
| Rating [kw] | 250 |
| Type | submersible |
TSE transmission System and Distribution Network start with TSE pump station that feeds 5 transmission mains. One (1) transmission main DN 600 to zone 4 with a maximum hourly TSE flow of 1,700 m3/h, Two (2) transmission mains DN 1,400 to strategic reservoir R-500, R-600 and R-700 in zones 5, 6 and 7 with a maximum hourly TSE flow of 17,850 m3/h, One (1) transmission main DN 1,100 to Sabah Al Ahmed with a maximum hourly TSE flow of 4,100 m3/h, and one transmission main with a diameter decreasing from DN 1,000 to DN 600 throughout its course to zone 1, zone 2 and zone 8 with a maximum hourly TSE flow of 4,750 m3/h.
| Transmission to | Zone 4 | Zones 5, 6, 7 (Riqqa) | Zones 1, 2, 8 | Zone Sabah Al Ahmed |
|---|---|---|---|---|
| Number of pumps | 3 (2+1) | 5 (4+1) | 4 (3+1) | 3 (2+1) |
| Hydraulic capacity [m3/h] | 850 | 4,464 | 1,584 | 2,052 |
| Delivery head [m] | 56.6 | 160.5 | 80.0 | 117.8 |
| Rating [kW] | 200 | 2,454 | 560 | 831 |
The transmission mains are connected to a network of 7 strategic and 32 secondary reservoirs the largest reservoir is R700 with volume equal 160,000 m3. The remaining is 6 identical strategic reservoirs located in zone 1, 2, 4, 5, 6 and 8 with volume equal 40,000 m3 each. The strategic reservoirs feed a total of and 32 Secondary Reservoirs 27 with a volume 2,000 m3 and 5 with volume 3,000 m3.
